Final answer:
The approximate half-life (T1/2) can be determined from Figure 3-15, and it falls between the provided options. In this case, the closest match is 10 hours. So, the correct option is B. 10 hours.
Explanation:
The approximate half-life (T1/2) as indicated in Figure 3-15 is essential in pharmacokinetics to understand the rate of drug elimination from the body. In this context, the given options are 5 hours (A), 10 hours (B), and 20 hours (C). Analyzing the figure, the most fitting choice is B, 10 hours.
Half-life represents the time required for a substance to decrease by half, reflecting the balance between drug absorption and elimination. It's a critical parameter influencing dosing intervals and overall drug effectiveness. In this scenario, the graphical representation in Figure 3-15 implies that the T1/2 lies closest to 10 hours.
Option A (5 hours) and Option C (20 hours) are further from the observed trend in the figure, making them less probable. The accuracy of dosage regimens and therapeutic outcomes relies heavily on a precise understanding of a drug's pharmacokinetic profile, especially the half-life. Therefore, the selection of option B aligns with the visual information provided, indicating an approximate T1/2 of 10 hours based on the graph.